“When lectins invade our bodies, they can cause some serious inflammatory responses and other health issues, like leaky gut syndrome, weight gain, brain fog, and more,” he says on his website.

Leaky gut syndrome. Say what.

His book lists foods that don’t do this, including broccoli, cabbage and avocados, along with fish and pasture-raised poultry.

Thing is, cutting out lectins to lose weight might work for Clarkson, but may not work for everyone.

Speaking to Women’s Health, Julie Upton, R.D., co-founder of nutrition website Appetite for Health, said that the book is based on the premise that lectins in grains, beans, peanuts, and other plant-based foods are pro-inflammatory.